Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [error]

The tag has no usage guidance.

0
votes
0answers
4 views

MetaMask - RPC Error: Error: WalletMiddleware - Invalid “from” address

I'm trying to create a simple Dapp (via tutorial) which would allow me to send Ether from sender to receiver (via a contract with an address that automatically approves the transaction). The truffle ...
1
vote
0answers
15 views

How to process null TransactionReceipt?

I have some transaction that is sent and from time to time when I call the eth_getTransactionReceipt I get a null. I see esentially two approaches for handling this: I could reiterate the call to ...
0
votes
1answer
27 views

TRUFFE MIGRATE: Saving migration to chain.Error: Error: Error: Returned error: VM Exception while processing transaction: invalid opcode

$ truffle migrate Compiling your contracts... =========================== > Everything is up to date, there is nothing to compile. Starting migrations... ====================== > Network name: ...
1
vote
0answers
27 views

Using web3j with infura returns null

I've used web3.js to handle my contracts, and it worked very well. But web3j is pretty hard for me since the beginning. I'm using android studio, infura, web3j. Since I don't know very much about ...
0
votes
0answers
17 views

DeclarationError: Undeclared Identifier. Did you mean “_data”? data = _data ^__^. All i want is to create a cryptocurrency

pragma solidity ^0.5.1; contract owner { address public owner; function owned() public { owner = msg.sender; } function set( string memory _data) public { data = ...
0
votes
0answers
22 views

How to handle estimate gas cost error?

I am programming a button for a transaction which shall only appear if the transaction is possible. Therefore, I am using the following code contract.methods.function(parameters) .estimateGas({...},...
0
votes
3answers
35 views

Solidity Compatibility Configuration

I am a cyber security analyst who is new to ethereum and working on a project to study crypto security. It's a series of 22 vulnerable smart contracts that you're supposed to exploit. For anyone who ...
0
votes
0answers
22 views

Accidentally sent REN (ETH token) to my ETH contract address using my Ledger Nano S. Can someone help please? [duplicate]

I sent REN (ETH token) to my ETH contract address by accident while using my ledger nano s. Can someone help me understand what's happened to the tokens and if I can retrieve my REN token from my ETH ...
1
vote
0answers
17 views

MetaMask returns different error - not longer working

I am calling the MetaMask promt successfully with this: ethereum.enable().then(response => { console.log("ABC"); }).catch(error => { console.log("XYZ") }); However, when I disagree ...
0
votes
0answers
14 views

Error while deploying smart contract ,BadFunctionCallOutput

The log i am having while deploying a smart contract: -------- load log data -------- user.address = 0x2154f8B602c470ae7F10f242DCC88Ae6221bb263 contract.address = ...
0
votes
0answers
33 views

Cannot read property length of undefined in Remix / tried to increase gas not working

My contract was working just fine, but I don't know what happened, now when I try to interact with a new instance of my contract from Remix I get this error 'cannot read property "length" of undefined'...
0
votes
1answer
175 views

Why am I Getting: Transaction Error. Exception thrown in contract code in Real?

WE Had Create A Dapp Like POWHD, we Already Deployed It And Some Of Transactions Are Already Done well. But After Some Time The issue I'm encountering with my real contract (Dapp) is that trying to ...
0
votes
1answer
32 views

Why does updating an external variable results in an error?

I'm trying to update a variable within an external contract. My 2 contracts are as follow: pragma solidity ^0.4.25; contract MainContract { string public variable1; function setVariable1(string ...
0
votes
0answers
41 views

- does not trigger a Solidity `revert` statement

My Smart contact was running smoothly .I was smoothly executing the function successfully . MinterFunction(address account, uint256 value) public { value = value.mul(1 finney); require(...
1
vote
2answers
24 views

Simple contract throws for no apparent reason

the thing is that i have a very simple contract code that I wrote as a kind of "Hello World!", but it doesn't seem to work properly, and I can't see any reason why it wouldn't work. The code I'm ...
0
votes
3answers
43 views

REMIX:This contract does not implement all functions and thus cannot be created

What should I do? pragma solidity ^0.4.21; contract ScoreInterface { function hit() public; function score() public view returns (uint); } This contract does not implement all ...
1
vote
1answer
41 views

Metamask Error messages shows only revert

I have a little problem with the error messages I receive from MetaMask. In my dApp I have a modifiers which should throw an error with an error message. However, in MetaMask I only receive the RPC ...
3
votes
2answers
233 views

Solidity! Invalid implicit conversion from string memory to bytes memory requested

pragma solidity ^0.5 contract ProofOfExistence { // ... some code here function proofFor(string memory document) public view returns(bytes32) { return sha256(document); } //...
2
votes
1answer
48 views

How to handle require/revert/assert errors properly

I'm trying to find an easy pattern to revert/rollback a write transaction. The first idea was to log a GenericErrorEvent but then I noticed that it will never be emited if any require/revert/assert ...
1
vote
2answers
85 views

Calling an address array in web3 returns an error that the method needs arguments

I'm declaring a public address array in my contract, but when I call it, I get an error saying it's expecting an argument. Can someone shine a light on what is happening here? Contract.sol uint ...
1
vote
1answer
24 views

Why is solidity throwing “Note: The constructor should be payable if you send value. ”, when clearly the issue is elsewhere?

I'm writing a contract on Remix that is able to deploy and track child contracts. Here are the 2 contracts: pragma solidity ^0.5.0; Contract Factory contract ContractFactory{ ChildContract[] ...
0
votes
1answer
109 views

ReferenceError: address is not defined

Truffle v5.0.5 (core: 5.0.5) Solidity v0.5.0 (solc-js) Node v10.15.1 ReferenceError: address is not defined. const ApprovalContracts = artifacts.require('../../contracts/ApprovalContracts.sol'); /...
0
votes
0answers
20 views

Not storing Item in variable

I am working on making a game where users can collect items. I have chosen to store the ERC721 tokens that represent the items in this way: Item struct: User struct and map that maps account-...
0
votes
1answer
43 views

Cannot read property 'hexToAscii' of undefined

deployedContract.deploy({ data: bytecode, arguments: [listOfCandidates.map(name => web3.utils.hexToAscii(Rama))] }).send({ from: '0xfb9286cde20bbd5ed60ee3bb156f9d9938c5b151', gas: 1500000, ...
0
votes
0answers
9 views

My ethereum based dapp throwing error :Unable to get UserError: ERROR: The returned value is not a convertible string:

I have setup a private ethereum network on an AWS ubuntu instance. The application has been deployed using truffle and uses metamask to approve transactions. There are two different pages one for ...
0
votes
1answer
89 views

NOOB Error : Transaction mined but execution failed

i´m learning Solidity now, and i saw this code on web but when i try to use the method "Deposito" i receive a error. Someone knows what's that ? (PS.: I try to put the value but every time i chose ...
0
votes
0answers
133 views

installing Truffle node-gyp rebuild Error

im trying to install Truffle and have run into numerous problems - made some headway after getting an earlier version of python but camt seem to figure out this error - could someone point me in the ...
1
vote
1answer
198 views

web3 is not defined problem

This is my simple html source code for my website. <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewpoint" content="width=device-width, ...
1
vote
1answer
186 views

“before all” hook: prepare suite

This is the error code: Adoption.sol code: TestAdoption.sol code: I dont know how to solve this, it fails when i try to use this comand: "truffle test". Thanks.
1
vote
1answer
368 views

Invalid bytes32 value [duplicate]

I am trying to learn about solidity so I just watch a tutorial about it, I already copy the same code as the tutorial but there is an error with bytes32. Here it is: That is the deploy code: And ...
0
votes
1answer
19 views

Augur: getShareToken returns error: invalid argument 0: json: cannot unmarshal hex string

I use the following code: augur.api.Market.getShareToken({ _outcome: "0x1", tx: { to: _market }, }, function (error, shareToken) { console.log(...
1
vote
1answer
32 views

Augur: Getting this error: “Error: eth_call returned no data (0x)” when I try to run any transaction APIs. Does anyone know what is going on here?

The address owns ETH as well as REP according to dev. I'm connected to Rinkeby . This happens when I run the folling code: const owner = require('./.pvt.js').ADDRESS; const daiAddress = require('./....
0
votes
1answer
33 views

Getting error on sending ether/wei in payable function

error: transact to CampaignFactory.createCampaign errored: VM error: revert. revert The transaction has been reverted to the initial state. Note: The constructor should be payable if you send value. ...
0
votes
0answers
124 views

Problems with sending ERC20 token

I have ETHSTEEM tokens in my MetaMask wallet (5.3.1) and when I tried to transfer them, 'fast' fee is over 1.3€, while for ETH transfer or AVINOC token it's around 0.01€. Even when I used this high ...
0
votes
0answers
383 views

FATAL ERROR: Rebalance Allocation failed - process out of memory

So while running truffle compile for my contracts on AWS Ubuntu server I got the following error: <--- Last few GCs ---> [17055:0x3985730] 11958 ms: Scavenge 511.7 (553.4) -> 506.9 (553.4) ...
1
vote
0answers
70 views

My code compiles on remix.ethereum.org but not on etherscan.io please help! [closed]

I get this error " ParserError: Function, variable, struct or modifier declaration expected. function transferFrom(address _from, address _to, uint _value) public returns (bool) ^ " everytime ...
3
votes
3answers
2k views

Truffle Box at URL https://github.com/truffle-box/bare-box.git doesn't exist

I'm trying to initialize a directory with truffle init, but I'm getting the following error: Error: Truffle Box at URL https://github.com/truffle-box/bare-box.git doesn't exist. If you believe this ...
1
vote
1answer
323 views

Error while installing web3

I'm getting these errors while executing npm install web3 How could i fix this?
2
votes
1answer
365 views

Running out of gas during a deploy due to a large number of require() statements?

I have a smart contract that has a fair number of functions, but a large number of require() statements because I carefully check every incoming parameter and some intermediate calculation results too....
0
votes
1answer
14 views

Struct param not found

I´m trying to call a function insertOrigin inside a struct and then call other function getOrigin to return that values. But VS Code get a error pragma solidity ^ "0.4.24"; contract Origin { struct ...
8
votes
2answers
216 views

Possible error in white paper validation algorithm?

If we take the block validation algorithm described in the white paper (Section Blockchain and Mining), it states at point 6: Let TX be the block's transaction list, with n transactions. For all i ...
1
vote
2answers
996 views

address payable type - store address and send later using Solidity 0.5.0

Solidity 0.5.0 has separated the "address" type into two types: address payable and address. Only address payable have the address.transfer method. I don't want to use the withdrawal mechanism. When ...
0
votes
2answers
68 views

Solidity can't modify block.timestamp due to lvalue xpression

I have a problem regarding modifying block.timestamp. I would like to modify timestamp in my network and change block.timestamp to unix timestamp, but I got an error at modification: TypeError: ...
0
votes
2answers
90 views

Why it's showing errors in this contract?

Actually, I wrote the code in multiple files, but since I need to Verify and Publish the code so, I tried to flatten the code. But now it is showing way too many errors. I put the code below with ...
1
vote
1answer
95 views

How do I resolve “gas required exceeds allowance or always failing transaction” when trying to send ether?

This is the sample smart contract I am trying to run. All methods work, except, "payVendor" - it fails with gas required exceeds allowance or always failing transaction . I have tried increasing the ...
1
vote
1answer
341 views

Fatal: Error starting protocol stack: listen tcp: lookup ”localhost”: no such host

I'm trying to run a Node on a private blockchain using the following command: geth --datadir data/privateBlockchain/ -networkid 1234567 -port 30306 -nodiscover -rpc -rpcapi “db,personal,eth,net,web3,...
0
votes
1answer
99 views

solidity dynamic struct array

when I develop my smart contract with solidity, I encounter a problem. And Below is my solidity code. pragma solidity ^0.4.0; contract RegisterContract{ event setNewUser(bytes32 name,address ...
0
votes
1answer
75 views

Catching errors with gas issues

I am working on the frontend where I use try / catch to find errors and give appropriate messages to users. My smart contract has a payable function and I was at the point of catching errors regarding ...
-1
votes
1answer
91 views

Expected primary expression error

I have this error: Expected primary expression. This is the code : pragma solidity ^0.4.17; contract Adoption { address[16] public adopters; // Adopter un animal function adopt(uint petId) ...